using System;
using System.Globalization;
using System.Windows.Data;
using System.Windows.Input;

namespace nExt.Core.UI.WPF.Converters
{
    /// <summary>
    /// ToString
    /// </summary>
    public class ToStringConverter : IValueConverter
    {

        /// <summary>
        /// Converts a value. 
        /// </summary>
        /// <returns>
        /// A converted value. If the method returns null, the valid null value is used.
        /// </returns>
        /// <param name="value">The value produced by the binding source.</param><param name="targetType">The type of the binding target property.</param><param name="parameter">The converter parameter to use.</param><param name="culture">The culture to use in the converter.</param>
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is Key)
                return new KeyToStringConverter().Convert(value, targetType, parameter, culture);
            string param = parameter != null ? parameter.ToString() : String.Empty;

            if (value is double)
                return System.Convert.ToDouble(value).ToString(param);
            if (value is int)
                return System.Convert.ToInt32(value).ToString(param);          
            if (value is float)
                return System.Convert.ToDouble(value).ToString(param);

            return value.ToString();
        }

        /// <summary>
        /// Converts a value. 
        /// </summary>
        /// <returns>
        /// A converted value. If the method returns null, the valid null value is used.
        /// </returns>
        /// <param name="value">The value that is produced by the binding target.</param><param name="targetType">The type to convert to.</param><param name="parameter">The converter parameter to use.</param><param name="culture">The culture to use in the converter.</param>
        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
        	return value;
        }
    }

}